How to calculate the coefficient of "bass boost" module in ADAU1701?

Hi everyone,

I'm using ADAU1701 and would like to control it with the MCU as the host.As I am going to use "bass boost" in my schematic,but I can not figure out the formula to calculate all the parameters of it.

Lowpass Freq,

High Threshold (dB)

Time Constant

Low Threshold ( dB )

Compression Ratio

Boost

Bass Freq

Actually,I do know there are 33 coeffients for some parameters of them.But there seems no any document to describe it.So I am asking for guiding to calculate them rather than explain the meaning of them.

Best Regards,

Liang.

Audio Signal Processors

SigmaDSP Audio Processors

adau1701